Germany’s oldest party was founded in 1875, and is described as "center-left". It roots in the 19th century labor movement.
The SPD is the second largest party in terms of voter support, but the largest in terms of membership. Its voter base is the working class in urban areas. SPD icon Willy Brandt was foreign minister in the first "grand coalition" government with the CDU 1966-1969 and then became the first SPD chancellor.
It's still not too late to pick your favorite German politicians. On July 3, the CDU will decide on their election program. They'll do so one week after the Social Democrats, whose platform should be ready this coming weekend.
Chancellor candidate Martin Schulz wanted to present himself as open, honest and down to earth in his book. But the SPD leader emphasized his new book is not an election manifesto. Volker Witting reports from Berlin.